Design of underground openings in competent rock / by Leonard Obert, Wilbur I. Duvall, and Robert H. Merrill.
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| Main Author: | |
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| Corporate Author: | |
| Format: | Government Document Book |
| Language: | English |
| Published: |
[Washington, D.C.] :
U.S. Bureau of Mines,
1960.
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| Series: | Bulletin (United States. Bureau of Mines) ;
587. |
| Subjects: |
| Item Description: | At head of title: Bulletin 587, Bureau of Mines. |
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| Physical Description: | 36 pages : illustrations, tables ; 26 cm. |
| Action Note: | committed to retain |